Anyway, I have put a bit more information about this tense up in the discussion.
No I didn't and I was not being deliberately obtuse. That's not what "some" means here. Pretend I used no word instead of "some" — it would have had the same meaning. I get the impression from your grammar that you are not a native English speaker. That's fine, but then you may not have a complete grasp on something like this.
That wouldn't be changing the meaning. I'm not continuing this conversation because 1) I don't want to argue about the subtleties of English grammar with someone who is not a native speaker, and 2) I don't want to argue about linguistics with someone who doesn't know linguistics (as proven by your pointing to "grammar books" for evidence that it's a tense).